One Direction member Harry Styles has a not so dark secret: He has four nipples. Yes, half as many as a hamster.

Before you get visions of 'Mallrats' dancing in your head, they're much smaller than your average nipples.

Styles once admitted to his "deformity," joking to Star magazine, "I must have been a twin, but the other one went away and left its nipples behind."

Hazza is just one of many celebs in the "multiple nipple" club, which includes Carrie Underwood, Lily Allen, Mark Wahlberg, Tilda Swinton and Gemma Arterton.

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